Spark-arrester



- llnirnn STATES JOHN M. PITCHER, OF SUGAR GREEK, INDIANA.

PATENT @rricn.

SPARK-ARRESTER.

SPECIFICATION forming part of Letters Patent No. 330,420, dated November17, 1885.

Application filed March 31, 1885. Serial No. 160,733. (No model.)

To all whom it may concern:

Be it known that I, JOHN M. PITCHER, of the town of Sugar Creek, andState of Indiana, haveinvented certain new and useful Improveprovementsin Spark-Arresters, of which the following is a specification.

The object of my invention is to provide means for arresting the sparksissuing from furnaces for heating locomotive, portable, and stationarysteam-boilers. I accomplish this object by means of thedevice describedin this specification, and illustrated in the drawings filedherewith,and made a part hereof.

Referring to the drawings, in which similar letters of reference relateto similar parts of my invention, Figure I is a side view of a boilerwith my device attached. Fig II is a vertical crosssection of Fig. I, onthe line X X. Figs. III and IV represent modifications of thespark-arrester,in sectional view, as applied in Fig. I.

In Fig. I, b indicates in dotted lines the boiler, with the ordinaryfire-box, fl), bridging DI), and fiuesfl.

d is a drum or jacket, constructed of sheet or boiler iron, of anydesired strength, and made in three sections. The central section,

a, is a plain cylinder. The two endsections,a

and a", are conical. These sections are firmly riveted together to forma steam-tight casing around the boiler, when attached thereto at the twoends, as indicated in the drawings, and supported by a suitable frame.

0 is a collar attached to the boiler over bridging-chamber bb, and G isa collar attached to the top of section a of drum d, to receive thespark'arrester sp, which consists of three sections of pipe,1,2,and 3.Section 1 of said pipe fits over collar 0 and receives the sparks andsmoke from the bridging-chamber bb, as indicated by the arrows,discharging the same into section 2 of the arrester, through which thesparks and smoke pass and discharge into the chamber ch.

Sections 1 and2 of my spark-arrester may be connected at the upper ends,as indicated in Figs. 1, III, or IV. In either case a dischargepipe, 3,is so arranged that one half thereof extends over ascending section 1,and the other half over the descending section 2, of the spark-arrester,as shown by the various relative figures.

0 is a cap made to fit over the top of section 3, provided with a hinge,by means of which it is opened and closed at will.

0 is a Smokestack attached to section a of drum d, and communicatingwith chamber ch.

st is an exhaust-steam pipe through which steam or air is injected intothe bridging chamber bb. The chamber ch is so adjusted as to leave alarger space above than below the boiler, as indicated in Fig. II.

The ascending section of my spark-arrester sp is placed over andperpendicular to the bridging-chamber bb, and joined to the descendingsection2 at the upper end. Section 2 inclines downward and connects withcham ber ch of drum (1. Sections 1 and 2 connect with section3, which isso arranged as to project half over the ascending and half over thedescending sections, and is provided with a hinged cap, 019, which canbe opened and closed at will.

The space between sections 1 and 2 of said spark-arrester is covered bya concave sheet. (See Figs. III and IV.)

The method of operating my device is as follows: Before firing up I openthe cap op, which allows the smoke to issue through section 3 of myarrester. When sufficient steam has generated to set the machineryin.motion, the cap op is closed and the exhaust-steam is injected intochamber bb through stezam-pipe st, creating a draft, which forces thesmoke and sparks up through section 1 of my sparkarrester, and downthrough section 2 and into chamber ch, as indicated by the arrows. I

In practice I prefer one of the various de vices shown on the drawings;but I do not wish to confine myself to this construction of myspark-arrester, as it is obvious that any arrangement for conductingthelive sparks and smoke from chamber bl) into chamber ch willaccomplish the same object in a more or less satisfactory manner withoutdeparting from the spirit of my invention.

The advantages I derive from the use of my invention are as follows: Ieffect a saving of a large per cent. of fuel, and avoid the dangerattending the use of boilers not provided with my device-an objectgreatly to be desired.

Having thus described my invention, its purposes and advantages, what Iclaim as new, and desire to secure Letters Patent, is-- 1. In aspark-arrester where exhaust-steam jacket d, with its collars O and O,aspark-aris employed for creating a draft, a drum or rester,sp,consisting of three sections, 1, 2,and jacket so arranged as to forma chamber 3, and a hinged cap, 0 0, to form a conductor around boilers,in combination with any defrom chamber bb to chamber ch, and steam- 2o 5vice for conducting smoke and cinders from injecting pipe st, allconstructed and comfire-places with steam or atmosphere, substanbined asillustrated in the drawings and detially in the manner and for thepurpose Set scribed in the specification, substantially in forth. themanner and for the purpose set forth.

2. In a spark-arrester for steam-boilers, the In Witness whereof I havehereunto set my 25 IO combination of the drum or jacket d, made in handand seal, at Indianapolis, Indiana, this three sections, the centralsection of which is 25th day of March, A.-D. 1885. cylindrical and thetwo end sections conicalshaped, with steam-pipe st, smoke-stack 0, JOHNPITOHER' and spark-arrester 81), substantially in the Witnesses: 15manner and for the purpose set forth. JAMES SULGROVE,

, 3. A spark-arrester consisting of drum or JOSH E. FLOREA.

